一张1米长的纸条上,在起始的位置上先用红、绿笔各画一道线,然后每隔5厘米用红笔画—道,每隔6厘米用绿笔画一道,两种颜色画在同一个地方的有[ ]
A.2处
B.3处
C.4处
答案:C
She is only ______ satisfied to copy notes of others without the pain of thought for herself.
A.very
B.much
C.so
D.too
正循环旋转钻成孔灌注桩的护筒内径应大于钻头直径()mm。
A.200;
B.150;
C.100;
D.50。