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【单选题】
临床上应用的第一个β-内酰胺酶抑制剂是A.
头孢克洛
B.
多西环素
C.
酮康唑
D.
克拉维酸
E.
头孢噻肟
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举一反三
【单选题】The primary difference between r2 and the adjusted r2 is that
A.
the adjusted r2 accounts for the total number of variables in the regression model.
B.
the adjusted r2 accounts for the number of independent variables in the regression model.
C.
the adjusted r2 accounts for the number of dependent variables in the regression model.
D.
the adjusted r2 accounts for multicollinearity.
E.
None of the above
【单选题】Which of the following is true according to the text?
A.
The unemployment rate in Japan is relatively high compared with other nations.
B.
The present unemployment rate in Japan is among the highest in its history.
C.
The government has not yet recognized the need to help non-regular workers.
D.
The government is reluctant to take measures to keep the technical workers.
【简答题】The voltage across the resistor R1 is obtained as the same fraction of the total voltage that R1 is of the total resistance.
【单选题】The author of the text is most prohably of the opinion that
A.
the sea is an inexhaustible resource of food supply.
B.
the shortage of food supply mainly results from unrestricted population growth.
C.
the inadequate food supply is chiefly caused by the negligence in exploration of the sea.
D.
it is the population projects, rather than the development of sea resources, that can improve the nutritional conditions of mankind.
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