题目列表(包括答案和解析)
Not until the early years of the 19th century______ what heat is.
|
A．man did know |
B．man knew |
C．didn’t man know |
D．did man know |
Not until the early years of the 19th century______ what heat is.
| A．man did know | B．man knew | C．didn’t man know | D．did man know |
Not until the early years of the 19th century ________ what heat is.
[ ]
Not until the early years of the 19th century ________ what heat is.
[ ]
Not until the early years of the 19th century ________ what heat is.
[ ]
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