[简答题]Interrupted mating experiment

[简答题]断裂基因(interrupted gene orsplit gene)

[填空题]A mating group consists of two females and one male.

[单项选择]（） to speak when the audience interrupted him.
A. Hardly did he began
B. No sooner had he began
C. Not until he begun
D. Scarcely had he begun

[单项选择]The experiment described in paragraph B
A. shows how we make use of smell without realising it.
B. demonstrates that family members have a similar smell.
C. proves that a sense of smell is learnt.
D. compares the sense of smell in males and females.

[简答题]The experiment was a success.

[填空题]His performance was (constant)（）interrupted by excited cheering of the audience.

[填空题]The experiment with starlings indicated that starlings might use______as a visual cue to determine compass directions.

[单项选择]

The American Space Agency is continuing experiments that would make possible extended periods of space travel. One of these experiments is aimed at finding ways to grow food in space. Scientists at the Kennedy Space Center in the Southern state of Florida are doing these experiments. They are attempting to grow vegetables that could survive without sunlight and dirt. Their laboratory is a large circular container. Computers control the levels of light, heat, water, fertilizer, and gases in the laboratory’s atmosphere. The plants are grown in special devices that hold about 1 centimeter of liquid plant food. Plastic sheets cover the roots of the plants. The containers are designed to keep the plants from floating away in the weightless environment of space. Water is collected and reused. Bacteria and fungi help turn plant matter into simple sugars that could be added to the astronaut’s food or fed to fish.
In the special containers plants can develop rapidly in
A. Scientists at the Kennedy Space Center are attempting to grow vegetables that could survive.
B. In the special containers plants can develop rapidly in a short period of time.
C. Scientists are also attempting to genetically design some of these plants to contain high levels of protein.
D. Space agency scientists hope to test some version of the experimental gardens on the planned space station.

[简答题]类实验(quasi-experiment)

[填空题]His performance was (constant) ______ interrupted by excited cheering of the audience.

[填空题]The scientist tried the experiment again and again ______ (regard) of the failure.

[填空题]The researchers have conducted an experiment to prove that people are more likely to act in emergencies when ______.

[填空题]Johnson made full preparation for the experiment ______(以便实验能顺利进行).

[单项选择]The experiment shows that proper amounts of exercise, if （　） regularly, can improve our health.
A. being carried out
B. carrying out
C. carried out
D. to carry out