可控硅触发电路不该触发时,其触发回路电压应小于()
A.0.15~0.25V
B.0.3~0.4V
C.0.35~0.45V
D.0.5~1.0V
参考答案:A
— Tom, did Mr. Li join you in your discussion?
— No, he _____, but he happened to have fallen ill.
A.would like to
B.will
C.was to have
D.was going to join
指出下列不正确的是
A.补气药主治潮热盗汗,手足心热,眼目干涩
B.补阳药主治畏寒肢冷,阳痿遗精,宫冷不孕,夜尿频多
C.补血药主治咽喉干燥,口干舌燥,干咳少痰,大便干结
D.补阴药主治面色萎黄,唇甲苍白,头晕眼花,心悸心慌
E.收涩药主治食少便溏,神疲乏力,脱肛,少言懒语,易出虚汗