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【单选题】
CT 型梯板的截面形状为( )A.
全部由踏步段构成
B.
由低端平板和踏步段构成
C.
由踏步段和平板构成
D.
由低端平板、踏步段和平板构成
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举一反三
【单选题】What is the professor’s opinion of a recent study of prairie dogs?
A.
She finds the study interesting but is not convinced that prairie dogs can communicate.
B.
She thinks that some claims made by the researchers are not supported by their findings.
C.
She sees the study as proof that mammals other than humans possess a form of language.
D.
She thinks the researchers misinterpreted the high-pitched barks as warming signals.
【单选题】火灾自动报警线路中,对线色要求,( )是不对的。
A.
探测器的安装接线“+”线应为红色，“-”线应为蓝色
B.
线色要全楼一致
C.
要分“+”“-”
D.
所有的24V，“+”线为红色，“-”线为蓝色
【简答题】根据下列文章回答 26～30 题： 第 26 题 Research carried out m the recent opinion polls shows that__________．
【单选题】火灾自动报警线路中,对线色要求,( )是不正确的。
A.
探测器的安装接线“+”线应为红色,“-”线应为蓝色
B.
线色要全楼一致
C.
要分为“+”“-”
D.
所有的24V,“+”线为红色,“-”线为蓝色
【单选题】There is no ______, in my opinion, of discussing this problem now. it's obviously too late. [ ]
A.
point
B.
good
C.
doubt
D.
use
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