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问题 多项选择题

防治松材线虫病重点应注意以下环节（）。

A、要把好检疫封锁关

B、要做到“治早、治小、治了”

C、要及时彻底清理病死树

D、资金到位

答案

参考答案：A, B, C

单项选择题 A型题

关于表面活性剂的叙述中哪一条是正确的（）

A.能使溶液表面张力降低的物质

B.能使溶液表面张力增加的物质

C.能使溶液表面张力不改变的物质

D.能使溶液表面张力急剧下降的物质

E.能使溶液表面张力急剧上升的物质
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单项选择题


What does the speaker mean a. June Allyson’s movie career gradually declined as she began to appear on TV. b. The frustration in the movie industry was one of the reasons that June Allyson turned to TV business. c. June Allyson gradually lost her interest in movie after she got top ranking in the film box office. d. June Allyson tended to challenge the TV business after she got top ranking in the film box office.
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