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【单选题】
This river forms a natural _______ between China and Korea. A. boundary B. string C. spot D. zoneA.
boundary
B.
string
C.
spot
D.
zone
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【简答题】二元混合物的焓表达式为H=x 1 H 1 +x 2 H 2 +ax 1 x 2 ，则 =______， =______。
【简答题】按照固体废物的形态固体废物分为____、____、____。
【简答题】二元混合物，若混合物的焓H=Ax 1 +Bx 2 +Cx 1 x 2 ，求(1)纯组分1的摩尔焓H 1 ，纯组分2的摩尔焓H 2 ，组分1的偏摩尔焓 ，组分2的偏摩尔焓H 2 的表达式(用x 1 ，x 2 表示，x 1 ，x 2 。分别为混合物中组分1和2的摩尔分数)。
【简答题】二元混合物的焓的表达式为H=x 1 H 1 +x 2 H 2 +αx 1 x 2 ，则 =______， =______。
【单选题】I am afraid he's more of a talker than a doer, which is ________ he never finishes anything.(2011·山东)
A.
that
B.
when
C.
where
D.
why
【单选题】－－－ He’s got our tickets. －－－ That’s good I____afraid that he them.A．am; has forgottenB．was; had
A.
28．--- He’s got our tickets. --- That’s good I____afraid that he them. A．am; has forgotten
B.
was; had forgotten
C.
was; forget
D.
am; will forget
【单选题】I _____ a good idea. [ ]
A.
think it's not
B.
am afraid it's not
C.
don't think that
D.
am afraid it's
【单选题】I am afraid he’s more of a talker than a doer, which is ______ he never finishes anything.
A.
that
B.
when
C.
where
D.
why
【单选题】—He’s got our tickets. —That’s good I ________afraid that he ________them.
A.
am; has forgotten
B.
was; had forgotten
C.
was; forget
D.
am; will forget
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