在市场经济条件下，如果其他方面没有大的问题，运营负荷的高低应主要取决于( )。
A．技术成熟程度B．产品生命周期C．配套条件D．市场
参考答案：D
指出错误并改正。
1. I persuaded Father to stop drinking, but failed.
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2. The armchair looks hard but it is comfortable to sit.
3. We are all surprising that he has persuaded the stubborn
man to change his mind.
4. They have made up their mind to study hard.
5. I prefer English than Chinese.
舵杆上（）的纵向裂纹可焊补修理。
A.长度＜1/4公称直径、深度＜10%公称直径
B.长度＜1/5公称直径、深度＜10%公称直径
C.数量不超过2条且不在同一条直线上
D.数量不超过4条
