Which statement is NOT true according to the last paragraph？
A. Sprinklers were used to protect citrus trees from being damaged.
B. Citrus trees would be damaged if the temperature drops below minus 2℃ for four hours.
C. The Carolinas, Tennessee and parts of Virginia were covered with snow.
D. Florida Citrus Mutual sprayed trees with sprinklers for citrus growers.
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A．He thinks that-the speaker won't show up.B．He thinks the seminar won't be open to th
A. He thinks that-the speaker won't show up.
B. He thinks the seminar won't be open to the public.
C. He thinks that there won't be enough seats for everybody.
D. He thinks that there might not be any more tickets available.
对于被判处徒刑缓刑的罪犯，都是由公安机关考察的。()
A. 正确
B. 错误
Which of the following statements is NOT true according to the text？
A. Building the special pressure chamber is too difficult to be done.
B. The density of the artificial diamonds is the same as the true ones.
Carbon turns into diamonds under very heavy pressure and high temperature.
D. Scientists had been working for many years to duplicate natural diamonds.
Thousands of earthquakes take place every day, but most of them are very gentle.
A. Y
B. N
C. NG
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