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【单选题】
输入齿轮的齿数为24,输出齿轮数为36,这个齿轮组的传动比为( )
A.
0.667
B.
1
C.
1.5
D.
2
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参考答案:
举一反三
【单选题】下列诱导乳糖操纵子转录的诱导剂是
A.
乳糖
B.
葡萄糖
C.
阿拉伯糖
D.
半乳糖
E.
AMP
【简答题】Dear Buyer, Your payment _____ item XXXXXX has been confirmed. We will ship your order out ________ 4 business days ________ promised. After doing so, we will ______ you an e-mail notifying you ______...
【单选题】下列化合物中,哪些能结合到乳糖操纵子的启动子附近的DNA上,促进RNA聚合酶的转录
A.
诱导物
B.
cAMP-CRP
C.
激活剂
D.
ATP
【简答题】The tracking number does not e____.( 存在)
【简答题】Please inform us the express tracking number after sending the samples immediately.
【简答题】Dear buyer, Your payment for item XXXXXXXhas been confirmed. We will ship your order out within XXX business days as promised. After doing so, we will send you an e-mail notifying you of the tracking ...
【判断题】The fourth s tep is to mail to the customer the delivery and the tracking number.
A.
正确
B.
错误
【单选题】下列化合物中,哪些能结合到乳糖操纵子的启动子附近的DNA上,促进RNA聚合酶的转录
A.
诱导物
B.
cAMP-CAP
C.
激活剂
D.
ATP
【判断题】You may login www. 17 track. net track your item 30 days later with the tracking number xxxx .
A.
正确
B.
错误
【简答题】The shipper fills the form provided by the shipping company as soon as he/she has all the details of the goods. 2. I placed an order on your website on January 22nd. It had been more than two weeks si...
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