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【简答题】
在多元线性回归模型中对样本容量的基本要求是(k 为解释变量个数):( )
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【简答题】People need something to ________ and to ________ what they're doing, and we hope that by doing these small gestures we're ________ to that.
【单选题】—We're doing a lot to protect our environment, but it is not good enough. —So we should try ______ to look after it. [ ]
A.
hard
B.
harder
C.
hardest
D.
hardly
【简答题】From time to time, we all get a bit down. Maybe we are feeling bad because we’re not doing well with our goals. There are many reasons for feeling down, but I’m not able to discuss all of them. ___小题1...
【单选题】The communities that I come from are very nervous about the outcome of what we're doing because it seems ______ even if the outcome is good.
A.
precarious
B.
precautious
C.
precious
D.
premature
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