叩诊肝脏相对浊音界时其叩诊音应是
A．由清音转为实音
B．由浊音变为实音
C．由过清音转为实音
D．由清音转为鼓音
E．由清音转为浊音
参考答案：E
---- Do you think the English class is _____________? ---- Yes, I enjoy it very much.
A．interested enough
B．interesting enough
C．enough interested
D．enough interesting
tRNA在发挥其功能时最重要的两个部位是（）
A.反密码子臂和反密码子环
B.氨基酸臂和D环
C.氨基酸臂和反密码子环
D.Tψ环和反密码子环
E.Tψ环和可变环
