嵌体洞缘洞斜面的角度为
A.转移焊接法B.前焊接C.后焊接D.离模焊接法E.连模焊接
参考答案:E
The government should protect the old valuable buildings_______ they are not in harmony with the modern ones nearby.
A.even though
B.as if
C.so that
D.now that
嵌入式系统是以()为中心,以计算机技术为基础,并且软硬件可裁剪,适用于()、()、()、()、()有严格要求的专用计算机系统。