以下关于心理应激的说法错误的是()
A.应激源是心理社会因素
B.肯定对工作会产生不良影响
C.可危及个人的生存和地位
D.可产生心理反应
E.可产生生理反应
参考答案:B
1千克梨有8个,1千克苹果比1千克梨的个数多1个,妈妈买了2千克梨和2千克苹果,共有苹果和梨______个.
It was now clear that no such weapons were manufactured and none been found.
A. was found B. were foundedC. has been found D. have been founded