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【单选题】
针对以下程序段，对于变量c的取值，至少需要(61)个测试用例才能够满足语句覆盖的要求。c=((u8_t*)q-＞payload)[i]；switch(c){case SLIP_END： sio_send(SLIP_ESC，netif-＞state)； sio_send(SLIP_ESC_END，netif-＞state)； break；case SLIP_ESC： sio_send(SLIP_ESC，netif-＞state)； sio_send(SLIP_ESC_ESC，netif-＞state)； break；default： sio_send(c，netif-＞state)； break； }A.
4
B.
3
C.
2
D.
1
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举一反三
【单选题】Recently, silly Mr. Smith received an invitation ____ a fashionable party.
A.
in
B.
for
C.
on
D.
to
【单选题】Recently, silly Mr. Smith received an invitation to a fashionable party. He didn’t know the hostess, ______.
A.
but he still decided to go to the party
B.
and he refused the invitation politely
C.
and he was sad about that
D.
and he thought it was strange
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