容易形成空洞的肺癌是()
A.鳞状上皮细胞癌
B.未分化癌
C.腺癌
D.肺泡细胞癌
E.小细胞癌
参考答案:A
解析:鳞状上皮细胞癌癌组织易变性、坏死,形成空洞。
在下列各句的空白处填入一个适当的词,使句子意思完整,语法正确。
1. When I saw him, he was walking ________ his school.
2. All the guests arrived at the party but the host didn't ________ up.
3. On Sunday school is usually ________ and students have one day off.
4. Gold is a kind of much-loved ________, so everyone like it.
5. Yesterday Tom ________ me some money and I returned it to him today.
效力待定的法律行为