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【单选题】
图示三杆结构,欲使杆3的内力减小,应该( )A.
mg src="http://p.ananas.chaoxing.com/star3/origin/f4ab85f481e8e8cf5b3bdfeb120d1cc6.jpg">
B.
增大杆3的横截面积;
C.
减小杆3的横截面积;
D.
减小杆1的横截面积;
E.
减小杆2的横截面积。
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反馈参考答案：
举一反三
【简答题】81的4次方根( )A. A. B. B. 3
【单选题】Listed below are the account balances of the Arthur Frank Corporation: Accounts Payable $ 75,000 Cash 100,000 Common Stock 500,000 Dividends 50,000 Land 60,000 Miscellaneous Expense 3,000 Service R...
A.
$263,000.
B.
$150,000.
C.
$127,000.
D.
$120,000
【单选题】Listed below are the account balances of the Arthur Frank Corporation: Accounts Payable $ 75,000 Cash 100,000 Common Stock 500,000 Dividends 50,000 Land 60,000 Miscellaneous Expense 3,000 Service Rev...
A.
$100,000.
B.
$338,000.
C.
$278,000.
D.
$213,000.
【多选题】Which properties listed below are related to the molecualr weight of a polymer?
A.
Glass-transition temperature
B.
Solubility
C.
Tensile strength
D.
viscosity of the melt
【单选题】A shoe retailer keeps track of all types of information about sales of newly released shoe styles. One newly released style was marketed to tall people. Listed below are the shoe sizes of 12 randomly ...
A.
B.
C.
11
【单选题】Bird Flu: Communicating the Risk The recommendations listed below are grounded in two convictions(信念): that motivating people to start taking bird flu seriously should be a top priority for government...
A.
Y
B.
N
C.
NG
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