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【多选题】
关于酸碱指示剂,下列说法错误的是A.
指示剂的变色范围必须全部落在滴定突跃范围之内
B.
指示剂用量越大越好
C.
指示剂本身是有机弱酸或弱碱
D.
指示剂本身易于水和乙醇溶液中
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举一反三
【简答题】汽车变速器按传动比变化方式的不同可分为哪几类?
【单选题】Consider a 2-by-5 integer array t, write a statement that totals the elements of the fourth column of t.
A.
sum = t[ 0 ][ 3 ] + t[ 1 ][ 3 ];
B.
sum = t[4 ][ 0] + t[ 4 ][ 1]+t[4][2]+t[4][3];
C.
sum = t[3][ 0] + t[ 3 ][ 1]+t[3][2]+t[3][3];
D.
sum = t[ 0 ][ 4 ] + t[ 1 ][ 4 ];
【单选题】According to the fourth paragraph, Bevans was found guilty because he ______.
A.
obeyed illegal orders
B.
was accused of murder
C.
disobeyed the superior orders
D.
offended against the law of war
【单选题】What does the man think of the exam?
A.
He's afraid to take exams.
B.
He only took the fourth exam.
C.
He didn't get the highest score on one exam.
【单选题】Peter had difficulty swimming across the lake, but he finally succeeded on his fourth ______.
A.
attempt
B.
process
C.
display
D.
instance
【单选题】The sentence'he was a shadow of the man...'in the fourth paragraph implies that______.
A.
Hemingway's unstable emotion made him look aged
B.
Hemingway began to seclude himself from the world
C.
Hemingway sometimes recalled his past time
D.
Hemingway fell into a state of melancholy easily
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