The ______ you are exposed to appliances with a strong field, the greater the harm done by electromagnetic radiation is.
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类癌是（）
A. 良性肿瘤
B. 恶性肿瘤
C. 交界性肿瘤
D. 癌前病变
E. 非肿瘤性良性病变
乳腺的良性肿瘤多呈（）
A. 结节状
B. 分叶状
C. 息肉状
D. 乳头状
E. 囊状
Questions 11 to 18 are based on the conversation you have just heard.
A. They shouldn’t make too many requests.
B. They should ask for further extension.
C. They should finish the project as scheduled.
D. They should not try their luck.
If the forest were to continue to be destroyed at the current rate, it would all ______ within the next 200 years.
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