限菌制剂
参考答案:
是指允许一定限量的微生物存在,但不得有规定控制菌存在的药物制剂,如口服制剂不得含有大肠杆菌、金黄色葡萄球菌等有害菌。
Mike _____ have stolen the money from the bank, _____ he appeared to be rich overnight. [ ]
A. can't; for
B. might; for
C. can't; since
D. might ;since
各仪表厂生产的调节阀,其阀座()
A.可互换
B.不可互换