真核生物mRNA前体的加工过程不包括
A．5′末端加帽
B．3′末端加多聚A尾
C．甲基化修饰
D．磷酸化修饰
E．剪切去除内含子并连接外显子
参考答案：D
小肠憩室最多见的部位是
A．十二指肠
B．空肠上段
C．回肠
D．回盲部
E．空肠下段
She gave him the suggestion _____ he _____ English jn a better way. [ ]
A. that; learns
B. whether; learn
C. that; learn
D. why; learned
