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【单选题】
Clearly, the hypothesis does need some _______, in the light of these surprising results.
A.
refinement
B.
refreshment
C.
retirement
D.
recruitment
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In her writing, she _______ for a balance between innovation and familiar prose forms.
A.
striven
B.
strove
C.
stove
D.
stolen
【单选题】函数$y = |x| + |x - 1| - |4 - 2x| $的最小值和最大值分别是 ( ).
A.
$-4,\quad 3 $
B.
$-3, \quad 3 $
C.
$-3, \quad 4 $
D.
$-4, \quad 4 $
【单选题】设随机变量t服从参数为2的指数分布，求方程$x^{2}+tx+4=0$有实根的概率。
A.
$1-e^{-8}$
B.
$1-e^{-4}$
C.
$e^{-8}$
D.
$e^{-4}$
【单选题】There are many joint _______ between American and Japanese companies.
A.
ventures
B.
risks
C.
chances
D.
hazards