调配色比时，哪三种颜色为基色？（）
A、红、白黑
B、红、黄、绿
C、红、黄、蓝
D、红、黑、蓝
参考答案：C
The car________to you for 2 months and please remember it needs oiling every month. [ ]
A. was rented
B. is renting
C. is being rented
D. has rented
恶性肿瘤向邻近器官侵犯的主要方式为（）
A.直接蔓延
B.淋巴管播散
C.血管播散
D.种植播散
E.接触播散
