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【单选题】
在土壤有机质测定过程中,消煮后的重铬酸钾溶液如果以绿色为主,说明——A.
氧化剂过量，需增加土壤称样量，重做
B.
氧化剂不足，需减少土壤称样量，重做
C.
氧化剂过量，需减少氧化剂，重做
D.
氧化剂不足，需增加氧化剂，重做
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【单选题】Music and Driving Listening to loud music while driving can seriously hamper reaction times and cause accidents, new research suggests. A Canadian study found people took．up to 20% longer to perfer,ph...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Music and Driving Listening to loud music while driving can seriously hamper reaction times and cause accidents, new research suggests. A Canadian study found people took up to 20% longer to perform. ...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】While driving Daniel and Sophia saw wild horses. 查看材料
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】It is __________ that text messaging while driving is dangerous.
A.
necessary
B.
sufficient
C.
obvious
D.
significant
【简答题】Driving In America Keep Right The traffic follows the “keep right rule”. While driving, drive on the right side of the road. On one-way, multiple lanes(车道) road, the right-most lane would be slowest a...
【单选题】Some drivers always drive carelessly. There is some ____ danger while they are driving.
A.
painful
B.
potential
C.
probable
D.
primary
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