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【单选题】
下列有关糖类的说法中,错误的是( )A.
糖类由碳、氢、氧三种元素组成
B.
糖类是人类食物的重要成分之一
C.
在人类食物所提供的总能量中有 60% ～ 70% 来自糖类
D.
淀粉在人体内经酶的作用，与水发生一系列反应，最终变为蔗糖
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【简答题】集成电路失效率随时间变化的曲线称为
【单选题】It was about 2 p.m. on Mar. 9 when three Nucor Corp. electricians got the call from their colleagues at the Hickman (Ark.) plant. It was bad news: Hickman's electrical grid had failed. For a minimill ...
A.
fails frequently
B.
seldom fails
C.
can not bear failure
D.
affect little when fails
【单选题】When the steel plant shut down, the town's people were all _________. The workers had no jobs, and the shops had no business. It was really tough all around.
A.
in a boat
B.
in the boat
C.
in the same boat
D.
on the same boat
【单选题】消化性溃疡主要发生在
A.
幽门螺杆菌感染，胆汁反流
B.
胃、十二指肠
C.
餐后痛
D.
饥饿痛
E.
空腹，餐前0.5-1小时
F.
餐后1小时
G.
司机、高空作业、精密仪器操作者
H.
B12
I.
B6
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