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问题
单项选择题
115．通常在整定调节器参数时，应把（）放在首位。
A.快速性
B.稳定性
C.准确性
D.安全性
答案
参考答案：
B
选择题
A big step _____ to strengthen China's health care systems since we launched an effort in 2008.
A. has been taken
B. is being taken
C. was taken
D. had been taken
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单项选择题
绿茶的制作步骤有几个？（）
A.2个
B.3个
C.4个
D.5个
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