听力原文:M:Did you hear that Bob got sick yesterday during the final examination? W:Yes,I did.I think lately he has bitten off more than he can chew in studying and working. Q:What does the woman mean? (14)
A.
He always eats more than he can chew.
B.
He eats while studying and working.
C.
He got sick because he ate too much.
D.
Bob is trying to study and work too much.
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【单选题】Magnetic particle inspection is a means for detecting discontinuities at or near the surface in_______materials?
【单选题】A recently published systematic review nicely summarizes that:
A.
the huge variety of bonding methods used on dental oxide ceramics and their results in laboratory bond strength testing.
B.
published clinical trials on bonded oxide ceramic restorations and correlate their results with that of laboratory bond strength testing use the same bonding methods as in the clinical trials.
C.
23 different surface treatments that had been tested still with a wide variation of specific conditions.
D.
the vast amount of laboratory research it really is still a significant problem in dentistry to bond reliably to oxide ceramics such as alumina and zirconia ceramics.