心脏骤停最主要的诊断标准是（）。
A.意志丧失
B.动脉搏动消失
C.呼吸缓慢
D.心音消失
E.全身发绀
参考答案：D
用所给词的适当形式填空。
1. All the football ________ (play) play well in this match.
2. There are six ________ (match ) in the afternoon.
3. I enjoy ________ (draw) some pictures on the wall.
4. ________ (be) your sister good at playing volleyball?
5. Tom usually _________ (watch) TV after he does his homework.
新生儿期筛查苯丙酮尿症最常用的实验室方法为（）
A.尿三氯化铁试验
B.DNA分析
C.尿2，4-二硝基苯肼试验
D.Guthrie细菌抑制试验
E.染色体核型分析
