在传染性肝炎前驱症状期,下述哪种血浆酶活性测定最可能异常()。
A.γ-谷氨酰转移酶
B.碱性磷酸酶
C.肌酸激酶
D.丙氨酸氨基转移酶
E.对尿素稳定的乳酸脱氢酶
参考答案:D
–I’m not good at English, Amy. What should I do?
--You practice it more. For example, you read English every morning.
A.should; shall
B.should; could
C.could; will
D.must; are able to
电阻R1=10Ω,R2=40Ω,R1与R2串联时,其总电阻为______Ω,若将它们改为并联,则其总电阻将______(选填“变大”、“变小”或“不变”)