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【单选题】
pH相同的醋酸和盐酸，分别用水稀释至原体积的m倍和n倍，稀释后两溶液pH仍相等，则m和n的关系是A.
m=n
B.
m＞n
C.
m＜n
D.
无法比较
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【单选题】、There are many _____ in our school.
A.
woman teachers
B.
man teachers
C.
women teachers
D.
men 's teachers
【单选题】There are over 300 teachers in our school,_________ of them are women teachers.A．two fifthsB．seco
A.
7. There are over 300 teachers in our school,_________ of them are women teachers. A．two fifths
B.
second five
C.
two five
D.
two fifth
【简答题】7. Our attitude towards life should be
________.A. pessimistic B. optimism C. negative D. positive
【简答题】听音，补全短语。 1. our ______________ 3. go ______________ 5. on the ______________ 7. brush my ______________ 9. on the ______________ 11. Jenny's ______________ 13. speak ______________ 15. Christmas _____...
【简答题】7. Our teacher is
strict. Our teacher is fair.
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