脑囊虫（） A.月经期发作频繁 B.头痛伴剧烈呕吐 C.头痛伴视力障碍 D.头痛伴癫

— Dad,could you buy me a MP4 like this?

— Sure, we can buy ____ one than this, but ____this. [ ]

A. a worse, as good as

B. a better, better than

C. a cheaper, as good as

D. a more important, not as good as

预防战创伤感染最有效的措施是（）

A.及早包扎伤口

B.加压包扎止血

C.良好的固定

D.大剂量应用广谱抗生素

E.早期施行清创术

点火系统中控制的几个要素是（）

A.分电器、闭合角

B.提前角、点火头

C.提前角、闭合角、爆震控制

D.通电时间、爆震控制

轧辊抗弯性能好，则表示轧辊（）好。

有毒重金属