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【单选题】
酶作为典型的催化剂可产生下列哪种效应（）A.
提高活化能
B.
降低活化能
C.
减少反应的自由能
D.
提高产物的能量水平
E.
降低反应物的能量水平
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举一反三
【单选题】S1:Hello, Captain. Glad to meet you again. And it's really a pleasure to come on board your ship. Do you still remember me? My name is John Smith.S2:Oh, how are you, Mr. Smith? I do remember you. We m...
A.
It is steam-powered.
B.
It is diesel-powered.
C.
It is turbine-powered.
D.
It is nuclear-powered.
【单选题】S1:Hello, Captain. Glad to meet you again. And it's really a pleasure to come on board your ship. Do you still remember me? My name is John Smith.S2:Oh, how are you, Mr. Smith? I do remember you. We m...
A.
Tow years ago.
B.
Half a year ago.
C.
A year and half ago.
D.
A year ago.
【单选题】I'm so glad you've come here to ________ this matter in person. [ ]
A.
lead to
B.
see to
C.
turn to
D.
refer to
【简答题】银镜粘贴应选用 玻璃胶, 发泡胶压出后起迅速膨胀,起填充孔洞,粘合的作用
【单选题】S1:Hello, Captain. Glad to meet you again. And it's really a pleasure to come on board your ship. Do you still remember me? My name is John Smith.S2:Oh, how are you, Mr. Smith? I do remember you. We m...
A.
The type of engine.
B.
The type of propeller.
C.
The navigational speed of the vessel.
D.
The steering gear and telegraph.
【单选题】S1:Hello, Captain. Glad to meet you again. And it's really a pleasure to come on board your ship. Do you still remember me? My name is John Smith.S2:Oh, how are you, Mr. Smith? I do remember you. We m...
A.
The vessel has five hatches, two forward of the birdge and three astern of it.
B.
The vessel's engine is single-screwed and her propeller is right-handed.
C.
The steering gear and telegraph are both in good working order.
D.
The gyrocompass of the vessel is about 2 degrees plus.
【单选题】I'm so glad to see you back, Lucy. How long _____ at your grandma's? [ ]
A.
had you stayed
B.
did you stay
C.
have you stayed
D.
do you stay
【单选题】I'm so glad to see you back，Lucy. How long at your grandma's？
A.
had you stayed
B.
did you stay
C.
have you stayed
D.
would you stay
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