皮皮学，免费搜题
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【单选题】
关于饮食健康的科学合理搭配方式的描述，较为合理的是A.
蛋白质+碳水化合物
B.
蛋白质+碳水化合物+脂肪
C.
蛋白质+碳水化合物+脂肪+矿物质
D.
蛋白质+碳水化合物+脂肪+矿物质+膳食纤维
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举一反三
【简答题】已知int i;float f;,下列正确的语句是() A.(int f)%i; B.int(f)%i; C.int(f%i); D.(int)f%i;
【简答题】You ought to drive very cautiously on such a ______ day. (fog)
【单选题】Some diesel engines are supercharged with a （）
A.
slam charger
B.
turbocharger
C.
fuel atomizer
D.
fuel injector
【单选题】You are inspecting the lower main precision bearings on a diesel engine .You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by _____.
A.
large dirt particles in the oil supply
B.
insufficient lubricating oil and overheating
C.
normal wear
D.
water contamination of the lube oil
【单选题】All diesel engines are classified as（）.
A.
four cycle
B.
compression ignition
C.
vacuum ignition
D.
external combustion
【单选题】When you experience and observe your inflection point, you should stop your career at once.
A.
Y
B.
N
C.
NG
【单选题】Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.
A.
cooling water
B.
compressing air
C.
compressed air
D.
cylinder oil
【单选题】When you do an experiment, it is important that you have ____ patience to observe and record ___ whole process of the experiment [ ]
A.
a ; a
B.
the; the
C.
the ; a
D.
/; the
【简答题】（9分）目前世界上比较先进的电解制碱技术是离子交换膜法。 （1）电解前，如果粗盐中SO 4 2 ˉ含量较高，必须添加试剂除去SO 4 2 ˉ，则按添加试剂顺序，依次发生反应的离子方程式为 。 （2）补齐下列电解饱和食盐水制烧碱的离子方程式： ______________________ __________________________________ （反应物） ...
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