碱性集料与沥青粘附性好,通常是用集料水溶液的PH值来判断集料的酸碱性。()
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原核细胞的起始氨基酸是(),起始氨酰-tRNA是();真核细胞的起始氨基酸是(),起始氨酰-tRNA是()。
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
A. If
B. Shall
C. Should
D. Whether
除氧器液体设定值是()mm。
A. 1078
B. 1079
C. 1080