遇到这种情况时,中间车道不允许车辆通行。
参考答案:对
结肠癌出现肠梗阻多表现为()
A.完全性肠梗阻
B.急性肠梗阻
C.慢性不完全性梗阻
D.高位梗阻
E.麻痹性梗阻
Hamburgers are very delicious, ______ they are not healthy. [ ]
A. but
B. because
C. or
D. so