句型转换

1. Is this a ruler?(作否定回答)

____, it ____.

2. Dick is sixteen.(对画线部分提问)

____ ____ is Dick?

3. That's an English book.(改为复数句)

____ ____ English books.

4. They are in Class One, Grade Seven.(对画线部分提问)

____ class are they ____?

5. That is my mom.(对画线部分提问)

____ ____ that?

下列不是卵巢恶性肿瘤的影像学诊断依据的是（）

A.肿瘤壁不规则，壁结节融合成块

B.肿瘤内分隔厚且不规则

C.肿瘤周围可有化学位移伪影

D.合并有腹水

E.有转移病灶