题干

下列有关生物工程的说法中,正确的是(     )

A:培育三倍体转基因鱼可以防止基因在同种个体中扩散

B:试管婴儿技术主要可以用来控制我国性别比例不平衡的问题

C:我国开展生态工程重视生态环境保护与经济效益、社会效益的结合

D:无废弃物农业符合物质循环再生的原理

上一题 下一题 0.0难度 选择题 更新时间:2017-04-01 08:50:17

答案(点此获取答案解析)

A,C,D

同类题1

阅读理解

    First opened to the public in 1976,the California State Railroad Museum is one of Sacramento's largest and most popular visitor destinations.Over 500,000 people visit the museum every year,with guests traveling from throughout the world to experience this world-famous place.

    The museum consists of six original buildings.The main exhibit building,the Railroad History Museum,totals 100,000 square feet.Completed at a cost of US $16.1 million,it opened in May 1981.

    Hours: The museum is open daily (except on Thanksgiving,Christmas and New Year's Day) from 10 a.m. to 5 p.m. From May 28 to September 3,the museum will be open until eight o'clock in the evening.

    Admission: US $10 for adults,US $5 for youths aged six to seventeen;Children aged five and under are free; Cash,personal checks,traveler's checks and credit cards are accepted for payment.

    Location: The California State Railroad Museum is located at the corner of Second and “I” street in Old Sacramento.

    Parking: A limited number of spaces are available for parking on the streets near the museum.However,these spaces are not suitable for guests visiting longer than 90 minutes.All-day parking is available in the large public garage at the “I” Street entrance to Old Sacramento,for a small fee.

    Food Service: Many restaurants are located near the museum.These range from reasonably priced, family-friendly places to some of the finest dining restaurants in the city.

    Accessibility: The museum is fully accessible to people with disabilities.Certain exhibits and programs have limited accessibility,due to factors such as narrow and historic stairways.

    Photography: We welcome photography for personal use.Hand-held cameras are allowed;however,tripods are not permitted for safety reasons.A Morning for Photographers at the museum is a special event.Tripods are allowed during this event.

同类题3

阅读下面短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

A

Safety and Security Procedures

   Your safety and the security of your personal property(财产) are of the primary concern to those of us who welcome you as our guest. We urge you to take advantage of the following suggestions.

 YOUR VEHICLE

   Lock your vehicle and do not leave money or valuable items inside. We are not responsible for their loss.

TRAVELING

   Be good at noticing things around you when sightseeing or traveling. Stay in heavily traveled areas. Don't display large amounts of cash.

GUEST ROOM SECURITY

   For additional security, use the deadbolt (插锁) provided on your door and make sure the windows are locked. As an additional precautious measure, please secure the secondary locks provided. Do not admit anyone to your room without first making identification. A one-way viewer is provided in your door to assist with identification. If there is any doubt about the person's identity, please contact the Front Desk.

SAFETY BOXES

   Do not leave money or valuables in your room or vehicle. We provide free safety boxes for you. We are not responsible for items left in room valued over $200.

KEYS

   Safeguard your key. Please do not leave it in the door. Do not give your key to others or leave it unattended. Please leave your key at the Front Desk when you check out.

FIRE

   Please familiarize yourself with the nearest fire exits. Report fire or smoke to the hotel operator. In the unlikely event of a fire, please move quickly and calmly to the nearest safe exit and leave the building. Avoid the use of the elevator.

REPORTING

   Please report any suspicious activity, or safety concerns to management.