下列不能由太阳能直接转化而成的能量形式是（ ） A．核能 B．生物质能 C．电能

There are four basic skills in English learning — listening, speaking, reading and writing. Ms. Li suggests that students should spend 2.5 hours improving the four basic skills after class every week. According to Ms. Li’s form, Charles has spent        minutes in all (总计) practicing writing during the past three weeks.

A. 1.5                  B. 30              C. 90

虚劳脾气虚的主症是( )

A．食少便溏

B．形寒肢冷

C．倦怠乏力

D．舌苔厚腻

利凡诺引产的适应证，哪项是错误的：

A．适用于妊娠15～24周者

B．有心脏病，但能耐受手术者

C．近期曾有过同类引产手术者

D．子宫没有疤痕者

E．无急性传染病及生殖器炎症者

为什么近视眼手术术后感觉看东西对光线的要求比术前要高？

管子热弯