通草的药用部位为（）
A．心材
B．带钩茎枝
C．茎髓
D．藤茎
E．含树脂的心材
参考答案：C
大量输血后（）
A．血清K+↑
B．血清Cl-↑
C．血清Na+↑
D．血清C1-↓
E．血清K+↓
The noise outside was _______. [ ]
A. too irritating
B. so irritating so his speech was hardly audible
C. so irritating that his speech was hardly audible
D. so irritating enough that his speech was hardly audible
