诱发心衰的感染多为（）
A.呼吸道感染
B.泌 * * 感染
C.肠道感染
D.皮肤感染
E.病毒性肝炎
参考答案：A
当你用筷子夹菜往嘴里送时，肱二头肌和肱三头肌处于的状态分别是（ ）
A．收缩、收缩
B．舒张、收缩
C．收缩、舒张
D．舒张、舒张
Playing a sport is _____ more than feeling tired. There are _____ effects that you feel after you play it. [ ]
A. few; some
B. less; many
C. little; a lot of
D. much; many
