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【单选题】
冰的熔化热为 330.5 J·g-1，则1.00 g，0℃的水凝固为同温度的，其熵变为A.
-330.5 J · g -1
B.
-1.21 J · g -1 · K -1
C.
0
D.
+1.21 J · g -1 · K -1
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【单选题】—______ does your mother go for a walk？ —Every afternoon.
A.
How long
B.
How often
C.
How much
D.
How many
【单选题】— When does your mother go shopping? — Usually _____ Sunday mornings. [ ]
A.
on
B.
in
C.
at
D.
for
【单选题】-How does your mother go to work? -_.
A.
On foot.
B.
On feet.
C.
With foot
D.
With feet
【单选题】—_____ does your mother go to work every morning? —At eight o’clock.
A.
When
B.
Why
C.
Where
D.
How
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