基牙牙合支托连线形成:()
A.回转线
B.牙合力线
C.支点线
D.观测线
E.外形高点线
参考答案:C
(),
A.
B.
C.
D.
When John lost his job, he found _____________to get a new one.
A.that’s impossible
B.impossible
C.that impossible
D.it impossible