The relief grade of fluorite is : ( )
A: Negative high relief
B: Positive low relief
C: Positive median relief
D: Twinkling
A: Negative high relief
B: Positive low relief
C: Positive median relief
D: Twinkling
举一反三
- “可轻松了”的英文表述 A: a sens of relief B: What a relief！ C: Much to my relief.
- Direct acting relief valve is often used as the pilot valve of safety valve or other pilot relief valve. ( )
- The spectators breathed a sigh of relief when __________.
- Relief agencies are drowning ______ frustration. () A: in B: for C: at D: by
- What was the priority for foreign disaster relief teams?