在DNA复制中，催化合成引物的酶是（）。

真核生物DNA复制中，DNA要分别进行随从链和前导链的合成，催化核内前导链合成的酶是（）

真核生物DNA复制中，DNA要分别进行随从链和前导链的合成，催化核内前导链合成的酶是

DNA重组的顺序是（）①用连接酶将外源DNA与载体连接。②培养细胞以扩增重组DNA。③通过转化将重组DNA引入受体细胞。④筛选出含有重组体的克隆。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

重组DNA技术中，常用到的酶是

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。