大型设备的安装必须由()承担。
A.有经验的专业队
B.业主指定的专业队
C.设备出租单位
D.具有资质证件的专业队
参考答案:D
关于深静脉血栓形成的临床表现,错误的是()
A.皮温降低
B.患肢疼痛、压痛
C.皮肤色素沉着
D.患肢肿胀
E.患肢周径增粗
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
A.gradually
B.loosely
C.exactly
D.frequently