A、<img width="124" height="30" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/79f809e5-9337-403e-a4e9-1c85d2a6d69a.png">
B、<img width="64" height="30" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/e0cd91a8-6094-4a44-a35f-1659f1954bf7.png">
C、<img width="130" height="31" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/68d8d3ce-58ab-4582-bdf3-1d12c1218e72.png">
D、<img width="96" height="32" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/bb9fb8c1-b074-46b8-82f2-3dccbf52009f.png">
A、<img width="116" height="26" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/4db8ac7e-602a-4909-bd20-b6023b9d92bd.png">
B、<img width="60" height="26" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/c2cfd101-3ba2-4097-9703-a1cc032b8b92.png">
C、<img width="116" height="26" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/30ea8550-d0ed-4d5a-928c-5e51236b7597.png">
D、<img width="83" height="26" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/99d923d7-382c-4d43-87fd-497ee738a347.png">
A、<img width="117" height="28" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/d2cebb51-b670-4308-b02e-26de5dc3f062.png">
B、<img width="67" height="31" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/d95061ab-1867-4257-a124-096778892198.png">
C、<img width="117" height="28" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/151f21af-007f-4444-99ee-e4a76d06929f.png">
D、<img width="84" height="28" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/f9c32638-92ce-45c2-b982-264bba7c21cd.png">
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试题解析
从甲公司开始，甲公司承包3项，有
种；乙公司承包1项，有
种；丙、丁公司各承包2项，分别有
和
种情况．由乘法原理，共
种情况．
