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【单选题】
某矿物各用一台破碎机和球磨机串联进行破碎。若进出破碎机的最大粒度直径分别为 50mm 和 20mm ,球机的出料最大粒度为 0.10mm ,则总破碎比为( )A.
5
B.
200
C.
500
D.
1000
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【简答题】●与十六进制数A C．E等值的十进制数是 (1) ，等值的八进制数是 (2) 。 (1) A．112.875 B．162.875 C．172.7 D．172.875 (2) A．254.16 B．254.7 C．530.07 D．530.7
【简答题】In a plant's life _______ , a seed grows into a plant, the plant produces seeds of its own, and then the plant dies.
【简答题】患者女,20岁。 主诉:左面部咖啡色斑上散在扁平状棕黑色色沉 病史:出生后即发现在左面部有咖啡色斑,后咖啡斑上逐渐出现扁平状稍突起的色素沉着,无痒痛感,随身体长大而逐渐增大。 查体:左面部咖啡色斑上散在针头及米粒大小扁平状稍突起的色素沉着斑,质软,大小不一。 请诊断并写出诊断依据及处理办法。 12
【单选题】This plant grows very fast, it should be regularly (定期) watered.
A.
because
B.
whether
C.
though
D.
therefore
【单选题】将整数378转换为二进制数、八进制数和十六进制数分别是（ ）。
A.
10111101，275，a71
B.
101111010，572，17a
C.
111101010，752，71a
D.
101010111，527，1a7
【单选题】This plant grows very fast, __________ it should be regularly watered.
A.
however
B.
although
C.
but
D.
therefore
【单选题】The author mentions 'the green film of plant life that grows on stagnant pools' (lines 6-7) in order to explain ______.
A.
how the sun affects lichens
B.
why plants depend on water
C.
where fungi become algae
D.
what algae arc
【单选题】We did have a quarrel about money last night, but now we have already _____.
A.
taken up
B.
made up
C.
put up
D.
brought up
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