小分子的苯醌及萘醌类具有( )。
A.无色B.多以游离状态存在C.多结合成苷存在D.升华性E.挥发性
参考答案:E
阅读短文判断正误,正确写T,错误写F,
Our school is very big and nice. In our classroom, there are some maps and pictures on the
wall. There is a nice clock on the front wall. There is a TV set in front of the room. There are many desks
and chairs in the room. Outside the rooms, we have a big playground. We can play soccer, basketball, and
any sports we like. We clean the school every day. We think it's very happy to study in the clean place.
( )1. The school is big and dirty (脏的).
( )2. There is a nice clock on the back wall.
( )3. There is a TV set in front of the room.
( )4. Every day the students clean the school.
( )5. We think it's happy to study in the clean place.
伽马刀治疗的主要优点是()
A.无手术创伤
B.对病灶周围正常组织损伤小
C.治疗疗程较短
D.价格便宜
E.以上都不是