原发性高血压患者中绝大多数为()发作时高血压(收缩压为主)急剧上升，全身症状严重()

2007年5月，太湖水由于水污染等因素引起了蓝藻大面积的爆发，使无锡市居民的生活用水受到了严重影响．在净化水的过程中，能够除去臭味的物质是（　　）

A．明矾

B．活性炭

C．漂白粉

D．氯气

烟叶不能与（）等有异味物品混存。

A.樟脑丸

B.化肥

C.松水

D.橡胶制品

W: Carol told us on the phone not to worry about her. Her left leg doesn’t hurt as much as it did yesterday.
M: She’d better have it examined by a doctor anyway. And I will call her about it this evening.
Q: What does the man think Carol should do().

A. See a doctor.

B. Stay in bed for a few days.

C. Get treatment in a better hospital.

D. Make a phone call to the doctor.

电缆线路应采用什么方式敷设，是否可沿地面明设？

空调与采暖系统冷热源和辅助设备及其管道和管网系统安装完毕后，冷热源和辅助设备必须进行（）。

A、试用

B、单机试运转和

C、调试

D、单机试运转和调试