A vessel is equipped with cross-connected deep tanks. In which situation should the cross-connection valve be closed? () The tanks lie above the waterline and are filled。 The tanks are partially filled with dry cargo。 The tanks are partially filled with liquid cargo。 The tanks are filled and lie below the waterline。
When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and () the sea water passing through the tubes. dispose。 dissolve。 heat。 dissipate。
通过下列()方法可以得到大肠杆菌组氨酸缺陷型的回复突变菌株。 转导。 紫外线诱变。 与野生型菌株发生接合。 转染。
平等互恵读音正确的是() びょうどうごえい。 びょうどうごけい。 びょうどうごえ。 ひょうとうごけい。
如果企业负债资金的利息率低于其资产报酬率,则提高资产负债率可以增加所有者权益报酬率。()
A sling psychrometer is a(n)().