证明:∵△ABC为正三角形,
∴∠A=∠C=60°,BC=AB,
∵AE=BE,
∴CB=2AE,
∵ADAC=13
选出下列语句中没有语病的一项( )
Mr. Zhang is mad at the children who often copy others' homework.
I can understand you____ (easy).