有极强的力,能起多级放大作用,可大大提高检测敏感度的是
A.双抗体夹心法B.双位点一步法C.竞争法D.应用素-生物素的ELISAE.捕获法
参考答案:D
句型转换。
1. He studies at No.1 Middle School. (改为否定句)
He _________ _________ at No.1 Middle School.
2. He plays basketball very well. (改为同义句)
He is _________ _________ playing basketball.
3. My brother walks to the school every day.(改为同义句)
My brother goes to school __________ _________ every day.
4. She never goes roller skating. (对划线部分提问)
__________ _________ does she go roller skating?
5.There is some bread on the table.(改为一般疑问句)
_________ there _________ bread on the table?
农业税实行( )的办法。
A.货币征收、货币结算B.实物征收、实物结算C.实物征收、货币结算D.货币征收、实物结算