题干

观赏植物滴水观音的叶片会“吐水“,这些水分是根从土壤溶液中吸收来的,将根吸收的水分运输到叶的结构是(   )

A:叶脉

B:根毛

C:筛管

D:导管

上一题 下一题 0.0难度 选择题 更新时间:2019-09-14 09:15:17

答案(点此获取答案解析)

D

同类题2

根据短文内容的理解,选择正确的答案。   

    Outside her shabby cottage, old Mrs. Tailor was hanging out laundry on a wire line, unaware that some children lay hidden in the leaves of a nearby tree watching her every move. They were determined to find out if she really was a witch.

    They watched as she took a broomstick to clean the dirt from her stone steps. But, much to their disappointment, she did not mount the broomstick and take a flight. Suddenly, the old lady's work was interrupted by the cackling of her hen—a signal that an egg had been laid in the warm nest on top of the haystack.

    The old broomstick was put aside as she hobbled off towards the haystack followed by Sooty, a black cat she had rescued from a fox trap some time back. With only three legs, it was hard for Sooty to keep up with the old lady. The cat provided proof—the children were sure that only a witch could own a black cat with three legs.

    There, standing on a wooden box, was Mrs. Tailor, stretching out to gather her precious egg. Taking the egg in one of her hands, she began to climb down when, without warning, the box broke and the old lady fell.

    "We have to get and help her," whispered Amy.

    "What if it is a trick?" replied Ben.

    "Don't be silly, Ben. If she were a witch, she would have turned us into frogs already," reasoned Meg. "Come on, Amy, let's go." The girls climbed down the tree and ran all the way to the haystack.

    Approaching carefully, they could see a wound on the old lady's face. She had knocked her head on a stone and her ankle was definitely broken. "Go and get Dad," Amy yelled to her brother. "Tell him about the accident."

    The boys did not need another excuse to leave. They ran as fast as they could for help, hoping that Mrs. Tailor would not wake and turn the girls into frogs.

同类题4

任务型阅读

    With more and more cars on the road, traffic jams (堵车) are inevitable. Traffic jams can lead to more accidents as there are more cars, with more people trying to get to their destination, all the while getting worse. Although it's impossible to avoid traffic jams altogether, there are some tips you can follow to reduce the amount of time on the road.

    Check for traffic jams before you leave. You can listen to the radio for traffic news, or check on the Internet to get up-to-minute information on traffic. If the route you want to take is heavy with traffic, you can choose another.

    Look for a different route all the time. Most traffic jams happen on busy roads. Using country roads could avoid a lot of traffic. Although the distance you may have to travel is further, it can work out quicker.

    Set your car radio to receive traffic bulletins. Many new car stereo systems (汽车音响系统) are equipped with a radio system by which you can hear the traffic channel. This way you can get the latest traffic information and change your journey if necessary.

    __________. Most traffic jams usually occur(发生) during rush hour, so try to avoid this time period if possible. Some jobs offer flexible working hours so that you can travel to work outside of rush hour. Some jobs even allow you to work at home so as to avoid moving altogether. Ask your manager to see what you can do if traffic is a problem for you.

    Use public transport instead. The easiest way to avoid traffic jams is to take buses or the underground instead of driving your own car. Not only will you avoid traffic jams but you will most likely be saving money.