题干

实验室配制体积为3:8的稀盐酸时,必不可少的一组仪器是(   )

A:玻璃棒、烧杯、托盘天平

B:量筒、烧杯、玻璃棒、胶头滴管

C:玻璃棒、药匙、烧杯

D:烧杯、量筒、药匙

上一题 下一题 0.0难度 选择题 更新时间:2019-03-07 09:32:45

答案(点此获取答案解析)

B

同类题3

完形填空。先通读下面的短文,掌握其大意,然后在每小题所给的四个选项中,选出可以填入空白处的最佳选项。

SAN FRANCISCO CELEBRATIONS

    Some of San Francisco's many celebrations, like the Fourth of July (U.S. Independence Day), are very American; but others 1 that San Francisco is a very international city.

    Over 100, 000 people celebrate the Chinese New Year in January or February. There are lion dances, fireworks, and a huge parade 2 the Financial District(地区)and Chinatown. It is the most important festival of the Chinese year, and the largest 3 event in North America.

    Tourists4 try to see the Cherry Blossom Festival(樱花节)at the Japan Center in April. This is a celebration of traditional Japanese culture with musicians, dancers, and artists, and a colourful 5.

    In early May, there is a Mexican festival called Cinco de Mayo, with a carnival(狂欢节) and lots of special events. And Carnaval San Francisco—a popular Latin American and Caribbean festival with salsa and reggae bands— 6 on the last weekend in May.

    On the Fourth of July, there are celebrations and parties all over the city, and everyone enjoys 7 the amazing fireworks over San Francisco Bay.

    On the night of 8 , thousands of people in costumes come to Market Street and Castro Street for a huge Halloween party. Many people think this is the most exciting night of the year.

    9 at Christmas time, there is a huge Christmas tree in Union Square, and the stores in the square have a competition for the 10 store window.