对立克次体感染最有效的药物是
A．前伸不平衡B．基托边缘伸展不够C．系带区基托缓冲不够D．侧方不平衡E．义齿磨光面外形不良
参考答案：A
Parents ____ bring up their children under 16 and educate them properly.
A．could
B．may
C．might
D．ought to
下法和消法在适应证上有何不同？
