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【单选题】
入侵探测器的探测灵敏度是指探测器对防范现场物理量变化的响应能力。对于被动红外探测器,它的度量值是( )。A.
最小温度差
B.
最小速度
C.
测试球的最低高度
D.
最大距离
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反馈参考答案：
举一反三
【简答题】We usually use the word "u_________ " to mean "agree to be responsible for a task".
【单选题】Which sentence is not the one we usually use when ordering?
A.
Do you have a table by the window right now?
B.
Maybe you could recommend something to us.
C.
Would you recommend something else for me? I’d like some real Chinese cuisine.
D.
That’s the dish.
【简答题】We usually use the letter 'R' for a (电阻) , 'C' for a (电容)
【简答题】We usually use the computer for sending and ____________ (receive) emails.
【简答题】A. IS Terrorists Release Execution Video of British "Spies” B. The five alleged spies were then shot in the head C. About five British men were accused of spying D. The British foreign office said fiv...
【单选题】Finish the sentence below. One main idea of the article is that ____.
A.
Akash’s family filmed a video while he was at the national spelling bee
B.
Akash might have a high finish in the Scripps National Spelling Bee next year
C.
Akash’s sister, Amrita, also went to the Scripps National Spelling Bee with Akash
D.
Akash is both a Scripps National Spelling Bee competitor and famous entertainer
【判断题】We usually use the following phrases in the ending paragraph, such as: in a word; in conclusion; all in all; from what has been discussed above; etc.
A.
正确
B.
错误
【简答题】体内多数酶的最适 pH 是_____,胃蛋白酶的最适pH为_____。
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