采煤面支架乳化液浓度达到标准要求（）有自动配比装置。
A、1～3％
B、3～5％
C、2～4％
参考答案：B
该患者腹痛发生的机制不包括
A．对胃酸刺激的痛阈降低
B．局部肌张力增高
C．胃酸对溃疡面的刺激
D．溃疡及其周围组织的炎性病变使局部内感受器的敏感性降低
E．浆膜面受侵
情景交际
A: Hello!My 1 is Ben.I'm from London. 2 your name? 3 are you from?
B: 4 is Jingjing.I'm from Beijing.I'm twelve 5 old. 6 is my friend. 7 from Dalian.His name
is Damao.
A: Nice to meet you, Damao.
C: Nice to meet you, too.
A: 8 9 are you in,Damao?
C: I'm in Grade Eight.
A: Oh,I'm in Grade Eight,too!We are in the 10 grade.
m?
ht,too!We are in the 10 grade.